Electrode tip-grinding method



Provided is an electrode tip-grinding method with which grinding malfunctions can be determined at times other than when maximum torque is being generated. Specifically, a tip dresser (18) is provided with a holder (27) that holds a cutter (28), a servo motor device (36) for rotating the holder (27), and a controller (50) for controlling the operation of the servo motor device (36). The servo motor device (36) outputs a torque generation signal to the controller (50) when a medium level load torque is being generated during normal grinding of a pair of electrode tips (11). When a torque generation signal is not input within a period corresponding to the time elapsed during normal grinding, the controller (50) determines there to be a grinding malfunction.




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